const copyrightFontSize0 = 12.0;
const copyrightFontSize = 12.0;
const buttonBorderRadius = 5.0;
const buttonTextFontSize = 17.0;
const bookshelfHeaderFontSize = 12.0;
const bookshelfHeaderIconSize = 19.0;
const bookshelfBookTitleFontSize = 13.0;
const detailStarFontSize = 22.0;
